Collaboration:

SHINES

We demonstrate the strain induced perpendicular magnetic anisotropy (PMA) in
a ferrimagnetic insulator (FMI),
Tm$_{\mathrm{3}}$Fe$_{\mathrm{5}}$O$_{\mathrm{12}}$ (TIG) and the first
observation of large anomalous Hall effect (AHE) in TIG/Pt bilayers.
Atomically flat TIG films were deposited by a laser molecular beam epitaxy
system on (111)-orientated substituted gadolinium gallium garnet substrates.
The strength of PMA could be effectively tuned by controlling the oxygen
pressure during deposition. Sharp squared anomalous Hall hysteresis loops
were observed in bilayers of TIG/Pt over a range of thicknesses of Pt, with
the maximum AHE conductivity reaching 1 S/cm at room temperature. The AHE
vanishes when a 5 nm Cu layer was inserted between Pt and TIG, strongly
indicating the proximity-induced ferromagnetism in Pt. The large AHE in the
bilayer structures demonstrates a potential use of PMA-FMI related
heterostructures in spintronics.

*This work was supported as part of the SHINES, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award # SC0012670.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2016.MAR.E18.10